The SSI Specialty Course Enriched Air Nitrox (SC-EAN) 40% Level 2 certification is an advanced program designed for qualified divers looking to push their underwater boundaries safely and enjoy the significant benefits of diving with enriched air nitrox. This specialty goes beyond standard nitrox training, equipping you with the critical knowledge and practical skills required to plan and execute dives using gas mixtures containing between 32% and a maximum of 40% oxygen.
By using richer nitrox blends, divers benefit from shorter surface intervals, significantly extended bottom times compared to air diving, and, when managed correctly, a potential reduction in overall fatigue after a day of diving. This course is for ambitious recreational divers who want more time to explore reefs, wrecks, and deeper environments, making it a valuable step for anyone planning repetitive dives or specialized diving vacations.
The Enriched Air Nitrox Level 2 course covers crucial theoretical knowledge and practical skills required to use high-oxygen mixes safely. Key topics included in the curriculum are the benefits of diving with Nitrox, identifying equipment compatible with enriched air, the physiology of oxygen and concerns regarding oxygen toxicity (including Central Nervous System and Pulmonary limits), using dive tables and dive computers set for Nitrox, and specific safety procedures.
The official SSI SC-EAN 40% Level 2 exam typically consists of a multiple-choice digital test, accessible via the MySSI app or website. Candidates will answer questions covering all the core theoretical topics mentioned in the course syllabus, including calculating Maximum Operating Depths (MOD) for various Nitrox mixes. While SSI exams are often open-book, you must aim for a passing score of at least 80% to achieve certification, making thorough study and preparation essential.
The best strategy for studying is to thoroughly review the digital SSI Enriched Air Nitrox course materials and complete all review sections. Utilizing practice tests and quizzes is highly recommended to build confidence and identify areas needing reinforcement. Ensure you also understand how to use your specific dive computer for Nitrox settings. The final exam is taken through an authorized SSI Dive Center or Resort, often as the culmination of your classroom or online training sessions. The practical component, involving tank analysis and documentation, must be completed under the direct supervision of an SSI Instructor.
While this specialty is primarily for recreational enjoyment and safety, holding the SC-EAN 40% Level 2 certification is a standard prerequisite or requirement for progressing toward professional diving certifications and specific roles, including:
Divemaster
Dive Guide (especially on liveaboards or deep diving destinations)
Scuba Instructor (required prerequisite for teaching Nitrox specialties)
Scientific Diver (many projects require Nitrox proficiency)
Public Safety Diver
Technical Diver (this course forms the foundation for advanced mix gas diving)
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